165210427 has 2 divisors, whose sum is σ = 165210428. Its totient is φ = 165210426.

The previous prime is 165210391. The next prime is 165210431. The reversal of 165210427 is 724012561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165210427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165210395 and 165210404.

It is not a weakly prime, because it can be changed into another prime (165210457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82605213 + 82605214.

It is an arithmetic number, because the mean of its divisors is an integer number (82605214).

Almost surely, 2^165210427 is an apocalyptic number.

165210427 is a deficient number, since it is larger than the sum of its proper divisors (1).

165210427 is an equidigital number, since it uses as much as digits as its factorization.

165210427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 165210427 is about 12853.4208287133. The cubic root of 165210427 is about 548.7137180918.

Adding to 165210427 its reverse (724012561), we get a palindrome (889222988).

The spelling of 165210427 in words is "one hundred sixty-five million, two hundred ten thousand, four hundred twenty-seven".